Igniter.



No. 889,338 PATENTED JUNE 2, 1908. G. J. SCHULTZ.

- IGNITER.

APPLIOATION FILED FEB. 26, 1907.

Witnesses Inventor 7% 660119 JJo/wlz.

I By has flttorn ey u I UNITED STATES PATENT oFFIoE.

GEORGE Jjfsoiiuixrz, or NEW YORK, N. Y., ASSIGNOR TO BENJAMIN BRISGOE,or TARRY- TOWN, NEW YORK.

'IGNITER.

Specification of Letters Patent.

Patented June 2, 1908.

Application filed February 26, 1907. Serial No. 359,422.

have invented certain new and useful In1- provements in'Igniters, ofwhich the followmg is a specification.

, Thisinvention relates to igniters or spark plugs such as are commonlyused in conned tion with internal'combustion engines and its object isto provide in a single structure a set of sparking points for themagneto current and a set of sparking points for the battery current:

In the use of internal combustion engines it has been found desirable toemploy a battery for supplying theignition sparks at the time the engineis beingstarted and also at periods when itis required to run veryslowly, and for the purpose of economy and to prevent exhausting thebatteries to employ a magneto driven by some operative part of 'theenine for giving the ignition sparks while t e engine is running undernormal conditions.

In the manner in which certain forms of engines, particularly automobileengines, are constructed, it is inconvenient to have more than onespark-plug or igniter opening into the cylinder, and consequently whenit is'desired to employ current from two sources it has been foundinconvenient to properly ar range the sparking points; but by thepresent improvement an igniter having two' sets of sparking points,which may be applied to the ordinary opening in the" cylinder forthe'igniter, is made possible. Not only is it made possible, but it 1s apracticable working device, as experience has demonstrated.

In the drawings accompanying and forming part of this specificationFigure 1 represents a central longitudinal section of a form of igniterequipped with my present improvement. Fig. 2 is a top plan view thereof.Fi 3 is a bottomviewthereof that is, Fig. 2 is Tooking at the devicetoward the-binding screws, and Fig. 3 is looking at the device towardthe sparkin points; and Fig. 4 is a section taken on a p lane at about.the line 44 Fig. llooking upwardly.

The smallness of the engine cylinders and the compactness of thestructure, together with the large number of attachments, leave to theother.

but very little rooin for the ignition device, and this has brought intorequisition the greatest skill and ingenuity to produce a small andcompact device which is'so constructed that there will be no leakagefrom one of the conductors of the electrical current The nearnesstogether of these conductors owing to the compactness of the device hasrequired the principal.

amount of ingenuity to he eX vended'in the insulation, and to preventlealcage between the parts which carry the sparking points.

The device illustrated in Fig. 1 of'the present drawings is shown ashaving a shell 10, which will preferably be made out of metal and have ascrew threaded end 11 for engaging an opening in the engine cylinder orignition chamber, and a squared head 12 for the engagement of a wrenchby which it may be screwed into such opening. The inner portion of theshell is shown as tapering downwardly, that is, the small end of thetapered opening is at the portion which will go into the opening inthe-ignition chamber. The insulation member in the present in-- stanceis shown as made up of two tapering bodies, which may be porcelain, 1-3and 14. The lower end of portion 14 is shown as the smallest and seatedwithin the shell 10. These insulation bodies 13 and 14- have two 0enings extending longitudinally through t 1cm in which are seated a pairof conductor rods 15 and 16 having head. portions 17 and 18 which areheld in position by means of set screws 19 and 20 and washers 21 and 22.The upper ends of these conductor bars are screw threaded and providedwith bindingscrew thumb-nuts 23 and 24,"respectiv ely,

which will be connected to the terminal wires of a magneto run by someportion of the engine and an electric battery, either primary orsecondary, as the case may be. The conducting rod 15 is shown ascarrying a sparking point 25 for cooperation with the sparking point 27which is driveninto the shell 10, and the conducting rod 16 is shown ascarrying a sparking point- 26 :06 erative with a sparking point 28driveninto t e shell. The openings through which'the conducting I rods1-5 and 16 pass are chambered out in the central portion and adjacent'to themeeting edges of the bodies 13 and 14, and the'rods arethere surrounded by some insulating material 29 and 30, which may bedifferent-from material, which it may be found convenient to have of atranslucent nature, as for in- S. Patent filed January Zl, 1907, Serialand in the present instance where two sources I flange may theinsulating material of which the bodies 1 13 and 14 are composed, forinstance, the bodies 13 and 14 may be made of some ceramic material, asfor instance porcelain, and the bodies 29 and 30 may be made of someinsulating material, such for instance as mica.

By reference to Figs. 2, 3 and 4 it will be seen that the bodies 13 and14 may be flattened and their smaller diameter may be considerably lessthan the diameter of the opening through the shell 10. Between themeeting ends of the bodies 13 and 11. there is imposed a disk 31. ofsome non-conducting stance mica to permit the action of the plugs to bevisible. This feature is broadly de scribed and claimed inmy'applicantionfor No. 358, 77().- In such copending application I havedescribed the advantages ensuing from having translucent"material.lmni'ediately adjacent to the s arking points so that their actionmay atal times be observed;

of electric energy are employed for pr0ducing the sparks, one at onetimeand another at another time, as the operator mayelect, it will befound highly advantageous to permit their action to be observed from asingle point of observation and through a single window, as .itwere. Theinsulation device will be held in the. shell 10 by having the disk 31 oflarger radius than the largest radius of thebodies 13 and 14 where thesecome together, and this disk may rest upon the to of an upstandingflange 82 on the shell, which be screw threaded for receiving the screwthreaded portion of ascrew collar 38 which has an inturned flange 34-for engaging the flange-31 and clamping it down upon the end32 of theshell. The collar may havea wrench engaging ortion 35 for facilitatingits operation and' or permitting the ready removal of the insulatingdevice and the points carried thereby when it is desired to take theseout for the purpose of cleaning;

To assist the insulation in preventing leaking and. prevent one-of thecurrents grounding upon the other the body 14 at-its 'lower' end isshown as extended, as at 1.40,at a 'dis tance beyond the end of thesparking point 26. This will serve to insure the entire insucuit fromthe other circuit.

It will be seen that each of the spark points 25 26 is carriedecccntrically of the opening in the shell 1-0 and that a rotation of thein sulation body Within the shell. will effect an. adjustment of thesparking points Z5 (3 relative to their cooperative points 27-28 foradjustably increasing and decreasing the spark gap, and it will producea like adjustment of both such gaps simultaneously.

Having described my invention 1 claim:

1. In an ignitiondevice, the combination with a shell having a centralopening and carrying a plurality of sparking points, a body ofinsulating material located within the opening of said shell but beingofless area than said opening, sparking points carried by said insulatingmaterial for cooperation with the sparking points carried by the shell,said body of insulating material carrying a trans-' lucent flange ofinsulating material, and means for securing said flange to-said shell.

2. In an ignition device, the coml'iinatioi'i with a shell, of a body ofinsulation located within said shell and having a portion ex tendingsubstantially in line with the end of said shell, and a portionextending beyond said .end, sparking points carried by said body ofinsulation material at each of said portions, and sparking pointsrespectively cooperative with these carried by the shell.

3. The combination with a metallic shell, of a plurality of sparkingpoints carried by the shell and occupying difi'erent planeslongitudinally of the said shell, an insulation member located withinsaid shell andhaving.

one portion of its end extending farther longitudinally of the shellthan an adjacent por tion, a sparking point carried by each of saidportions of the said insulation member and occupying different planeslongitudinally of the said member for cooperation with therespective/sparking points carried by the shell, and means forconnecting the sparking points carried by the insulation member withtheir respective electrical circuits.

Signed at Nos. 9-15 Murray st., N ew York, N. Y.,' this 23rd day ofFebruary, 1907.

' GEORGE \J. SCHULTZ Witnesses: v

JOHN O. SEIFERT, F. E. Boron.

